下拉刷新--第三方开源--PullToRefresh

时间：2022-06-07 03:24:44

效果预览图：

下拉刷新--第三方开源--PullToRefresh

下载地址：https://github.com/chrisbanes/Android-PullToRefresh

activity_main.xml:

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

     xmlns:tools="http://schemas.android.com/tools"

     android:layout_width="match_parent"

     android:layout_height="match_parent"

     tools:context="com.zzw.testpulltorefresh.MainActivity" >

     <com.handmark.pulltorefresh.library.PullToRefreshListView

         android:id="@+id/listView"

         android:layout_width="match_parent"

         android:layout_height="match_parent" />

 </RelativeLayout>

MainActuvity.java:

 package com.zzw.testpulltorefresh;

 import java.util.ArrayList;

 import java.util.Date;

 import com.handmark.pulltorefresh.library.PullToRefreshBase;

 import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;

 import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener;

 import com.handmark.pulltorefresh.library.PullToRefreshListView;

 import android.app.Activity;

 import android.os.AsyncTask;

 import android.os.Bundle;

 import android.os.SystemClock;

 import android.widget.Adapter;

 import android.widget.ArrayAdapter;

 import android.widget.ListView;

 import android.widget.TextView;

 import android.widget.Toast;

 public class MainActivity extends Activity {

     private PullToRefreshListView listView;

     private ArrayList<String> data;

     private ArrayAdapter adapter;

     private int count = 0;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         data = new ArrayList<String>();

         listView = (PullToRefreshListView) findViewById(R.id.listView);

         // 设置向下滑动时刷新

          listView.setMode(Mode.PULL_FROM_START);

         // 支持下拉和上拉  listView.setMode(Mode.BOTH);

         // 设置监听

         listView.setOnRefreshListener(new OnRefreshListener<ListView>() {

             @Override

             public void onRefresh(PullToRefreshBase<ListView> refreshView) {

                 // 在这完成业务逻辑

                 new MyAsyncTask().execute();

             }

         });

         adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, data);

         listView.setAdapter(adapter);

         // 设置如果数据为空的时候显示什么

         TextView textView = new TextView(this);

         textView.setText("请下拉刷新");

         listView.setEmptyView(textView);

     }

     private class MyAsyncTask extends AsyncTask {

         @Override

         protected void onPreExecute() {

             // 开始刷新

             listView.setRefreshing();

         }

         @Override

         protected Object doInBackground(Object... params) {

             // 假设耗时时间为3秒

             SystemClock.sleep(3000);

             return count++;

         }

         @Override

         protected void onPostExecute(Object result) {

             data.add(0, result + "");

             adapter.notifyDataSetChanged();

             // 设置标签

             listView.setLastUpdatedLabel("最后更新新的时间：" + new Date());

             // 刷新完成

             listView.onRefreshComplete();

             Toast.makeText(getApplicationContext(), "加载成功", 0).show();

         }

     }

 }

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